The nervous system - peripheral nervous system - ch 12

Question 1

Explain the main role of the peripheral nervous system?

Answer 1

To act as a communicator channel between the CNS and the body’s organs, glands and muscles and to sensory receptors in the limbs and the skin.

Question 2

What two systems can the peripheral nervous system be divided into?

Answer 2

1. somatic nervous system

2. autonomic nervous system

Question 3

What does the somatic nervous system transmit?

Answer 3

communications relating to the senses

Question 4

What is the somatic nervous system responsible for?

Answer 4

Managing voluntary body movements

Question 5

What does the somatic nervous system consist of?

Answer 5

1. 31 pairs of spinal nerves

2. 12 pairs of cranial nerves

Question 6

Describe the role of the spinal nerves?

Answer 6

spinal nerves carry sensory impulses into and motor impulses out of the spinal cord.

Question 7

How are spinal nerves named?

Answer 7

According to the vertebrae they are associated with

Question 8

How many pairs of cervical nerves?

Answer 8

8 pairs

Question 9

How many pairs of thoracic nerves?

Answer 9

12 pairs

Question 10

How many pairs of lumbar nerves?

Answer 10

5 pairs

Question 11

How many pairs of cervical nerves?

Answer 11

5 pairs

Question 12

How many pairs of coccygeal nerves?

Answer 12

1 pair

Question 13

Where do the nerves branch off from?

Answer 13

the spinal cord into the thorax, abdomen and extremities

Question 14

What is the role of the cranial nerves?

Answer 14

to carry impulses into and out of the cerebrum or brain stem

Question 15

Which nerves are named according to their function or structure and are designated by the roman numerals I-XII.

Answer 15

cranial nerves

Question 16

Cranial nerves are associated with?….

Answer 16

1. senses of smells
2. sight
3. hearing
4. taste
5. movement of eye muscles and tongue
6. movement of muscles that control facial expression and chewing

Question 17

The autonomic nervous system directs involuntary body functions; name the functions?

Answer 17

1. respiration
2. digestion
3. urine production
4. heartbeat
5. blood pressure

Question 18

What is the role of the autonomic nervous system?

Answer 18

1. Creates emotional responses such as sweating and crying.

2. monitors internal bodily activities

Question 19

What does the anatonomic nervous system do with the information gained from monitoring internal bodily activities?

Answer 19

ANS integrates it into the brain and then in response the ANS sends commands to involuntary smooth muscle in organs, glands and blood vessels.

Question 20

Name two subsystems that the ANS has?

Answer 20

1. sympathetic nervous system

2. parasympathetic nervous system

Question 21

What is the role of the sympathetic nervous system?

Answer 21

SNS manages the bodys reaction to stress and emergencies

Question 22

What happens when the SNS is activated?

Answer 22

1. heart and breathing rate increases
2. digestion slows or stops
3. pupils dialate
4. body begins to sweat

Question 23

When the SNS is activated what is it called when the SNS responds and works to prepare the body to either fight danger or flee from it?

Answer 23

fight or flight response

Question 24

What is the role of the parasympathetic nervous system?

Answer 24

to counteract the functions of the sympathetic nervous system

Question 25

What action does the parasympathetic nervous system take when it counteracts the sympathetic nervous system?

Answer 25

1. calms the body after the danger has passed 2. heart and breathing returns to normal 3. digestion resumes 4. pupils contract 5. sweating stops